《BS-8410-2007.pdf》由会员分享，可在线阅读，更多相关《BS-8410-2007.pdf（26页珍藏版）》请在三一文库上搜索。
1、BS 8410:2007 Code of practice for lightweight temporary cladding for weather protection and containment on construction works ICS 91.200; 91.220 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BRITISH STANDARD Licensed Copy: London South Bank University, London South Bank Univ
2、ersity, Fri Oct 05 02:52:29 GMT+00:00 2007, Uncontrolled Copy, (c) BSI Publishing and copyright information The BSI copyright notice displayed in this document indicates when the document was last issued. BSI 2007 ISBN 978 0 580 53076 0 The following BSI references relate to the work on this standar
3、d: Committee reference B/514/27 Draft for comment DC01/105835 Publication history First published September 2007 Amendments issued since publication Amd. no.DateText affected BS 8410:2007 Licensed Copy: London South Bank University, London South Bank University, Fri Oct 05 02:52:29 GMT+00:00 2007, U
4、ncontrolled Copy, (c) BSI BSI 2007i BS 8410:2007 Contents Foreword ii Introduction 1 1Scope 1 2Normative references 1 3Terms and definitions 2 4Selection of lightweight temporary cladding 3 5Precautions to be taken for particular applications 4 6Structural recommendations 8 7Fixings 9 8Erecting and
5、dismantling temporary cladding 10 9Care of lightweight temporary cladding 15 Annexes Annex A (informative) Sources of information relating to LTC products 18 Annex B (informative) Causes of deterioration of LTC and its fixings 19 Bibliography 21 List of figures Figure 1 Typical fixing arrangement fo
6、r nets and sheets 10 Figure 2 Methods of ensuring continuity of cladding 12 List of tables Table A.1 Properties of containment nets and sheets 18 Table A.2 Properties of rigid GRP profiled sheets 18 Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages
7、1 to 21 and a back cover. Licensed Copy: London South Bank University, London South Bank University, Fri Oct 05 02:52:29 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS 8410:2007 ii BSI 2007 Foreword Publishing information This British Standard is published by BSI and came into effect on 28 September
8、2007. It was prepared by Subcommittee B/514/27, Nets and sheets, under the authority of Technical Committee B/514, Access and support equipment. A list of organizations represented on this committee can be obtained on request to its secretary. Use of this document This British Standard is intended f
9、or use by designers, engineers, scaffolding contractors, safety net erectors and authorities having jurisdiction. As a code of practice, this British Standard takes the form of recommendations and guidance. It should not be quoted as if it were a specification and particular care should be taken to
10、ensure that claims of compliance are not misleading. Any user claiming compliance with this British Standard is expected to be able to justify any course of action that deviates from its recommendations. Presentational conventions The provisions in this standard are presented in roman (i.e. upright)
11、 type. Its recommendations are expressed in sentences in which the principal auxiliary verb is “should”. Commentary, explanation and general informative material is presented in smaller italic type, and does not constitute a normative element. Contractual and legal considerations This publication do
12、es not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. Licensed Copy: London South Bank University, London South Bank University, Fri Oct 05 02:52:29 GM
13、T+00:00 2007, Uncontrolled Copy, (c) BSI BSI 20071 BS 8410:2007 Introduction Containment nets, sheets and glass-reinforced polyester (GRP) rigid profiled sheets are materials used to temporarily clad scaffolds or buildings and are intended to: a)assist in the control of the environment, both inside
14、and outside the contained area, so as to minimize health risks; b)reduce the impact from environmental effects on the process being carried out in the contained area, in order to improve the quality of the work and productivity; c)assist in the containment of debris within construction, refurbishmen
15、t or maintenance sites; d)provide weather protection to those in the contained area; e)reduce the risk of injury to people or damage to property by influencing the route of fall of debris and/or objects; f)provide improved levels of security; while at the same time minimizing the loss of natural lig
16、ht to the containment area. In many cases such lightweight temporary cladding (LTC) is fitted by scaffolders, sometimes as a means of protecting themselves, but mostly for use by other construction workers or for the protection of the general public. However, it is essential that those fitting and m
17、aintaining the equipment ensure that it is fixed so that it will perform as intended. 1 Scope This British Standard gives guidance and recommendations on the application and use of lightweight temporary cladding systems on construction and similar sites where weather protection and/or containment of
18、 dust and debris is required. It is applicable to containment nets and sheets conforming to BS 7955, and to GRP sheets conforming to BS EN 1013-1 and BS EN 1013-2. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references,
19、only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. BS 476-3, Fire tests on building materials and structures Part 3: Classification and method of test for external fire exposure to roofs BS 476-7, Fire tests on bu
20、ilding materials and structures Part 7: Method of test to determine the classification of the surface spread of flame of products BS 7955:1999, Containment nets and sheets on construction works Specification for performance and test methods Licensed Copy: London South Bank University, London South B
21、ank University, Fri Oct 05 02:52:29 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS 8410:2007 2 BSI 2007 BS EN 1013-1, Light transmitting profiled plastic sheeting for single skin roofing Part 1: General requirements and test methods BS EN 1013-2, Light transmitting profiled plastic sheeting for singl
22、e skin roofing Part 2: Specific requirements and test methods for sheets of glass fibre reinforced polyester resin (GRP) BS EN 12811-1, Temporary works equipment Part 1: Scaffolds Performance requirements and general design 3 Terms and definitions For the purposes of this British Standard the follow
23、ing terms and definitions apply. 3.1attachment point designated point within a containment net or sheet through which ties can be threaded 3.2competent person person who has training and experience relevant to the matter being addressed, and has an understanding of the requirements of the particular
24、 task being approached NOTESuch a person is expected to understand the hazards and the methods to be implemented to eliminate or reduce the risks that may arise. For example, when on site, such a person is expected to recognize at all times whether it is safe to proceed. 3.3containment net wind-perm
25、eable or semi-permeable temporary cladding net, conforming to BS 7955, intended to restrain small objects or tools and debris, to restrict dust, to reduce the effects of weather and to provide protection for persons from falling objects 3.4containment sheet translucent, semi-permeable or non-permeab
26、le LTC sheet, conforming to BS 7955, intended to protect a structure from inclement weather, to contain dust and other pollution, and to prevent small objects, tools and debris from falling 3.5GRP sheet rigid profiled translucent impervious LTC sheet conforming to BS EN 1013-1 and BS EN 1013-2, inte
27、nded for longer term projects or where the cladding is vulnerable to high winds or heavy loads, and for temporary roofing 3.6lightweight temporary cladding (LTC) containment net, containment sheet or rigid GRP profiled sheet usually, but not exclusively, supported by scaffold, which provides protect
28、ion from the environment for workers, or protection of the environment from airborne materials such as dust 3.7tie means used to join separate sheets or nets into larger configurations and to secure them in position Licensed Copy: London South Bank University, London South Bank University, Fri Oct 0
29、5 02:52:29 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BSI 20073 BS 8410:2007 4 Selection of lightweight temporary cladding 4.1 Lightweight temporary cladding is particularly vulnerable to cutting and chafing and therefore liable to damage easily. NOTE 1For major long-term projects, building control
30、officers might have requirements for LTC, and might require materials of a particular specification. NOTE 2The durability and performance of nets and sheets is also dependent on the type, number and quality of the fixings; see Clause 7. NOTE 3See Annex A for background information relating to LTC. N
31、OTEGRP sheets embrittle quite slowly and will retain their strength for many years. 4.2 All synthetic fibres and textiles can be damaged through weathering and UV light. Normally, this results in a reduction in strength and embrittlement. Where the sheets might be in position over several seasons, t
32、he material should be regularly replaced or advice should be sought from the supplier or manufacturer. However, if care is taken in the design, positioning, erection, maintenance and use of the temporary cladding, these disadvantages can be largely controlled. 4.3 When ordering the LTC for a tempora
33、ry structure, at least the following information should be provided: a)dimensions of the structure to be clad (height, length, width and lift heights), including a drawing of the structure if possible; b)time to be allowed for the cladding to be erected; c)time over which the cladding is needed; d)c
34、onfirmation that the structure has been designed for the extra loads that could be applied due to the presence of the cladding see 4.4a), 4.4b) and 4.4j); e)what operations are going to be carried out from the structure to be clad; f)what materials are needed for the operation to be carried out, e.g
35、. chemicals for washing brickwork; g)any special needs, for example, flame-retardant materials, dust sheets, noise reduction, complete weather-proof enclosure, etc.; h)site location and likely climatic conditions. 4.4 The selection of LTC and its fixings should be made following a risk assessment ba
36、sed on individual site requirements. The risk assessment should take into account: a)size, nature and weight of any object(s) to be contained; b)additional loading that might be transferred to the structure or access scaffold from the containment net or sheet; c)whether the cladding needs to be flam
37、e-retardant; d)degree of protection required from rain or washing-down operations; Licensed Copy: London South Bank University, London South Bank University, Fri Oct 05 02:52:29 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS 8410:2007 4 BSI 2007 NOTE 1Where high dust concentrations occur inside the c
38、lad area, consideration should be given to the use of personal protective equipment for persons working in those areas. NOTE 2The appearance of the net or sheet deteriorates as dust builds up on them, their ability to transmit light is reduced, and the flow of air through nets and woven sheets is pr
39、ogressively impeded. e)need to prevent dust and debris from escaping to the environment; f)need to exclude airborne dust and debris from the work area; g)need for ventilation; h)possible reaction to chemicals used in facade cleaning, etc.; i)need for light transmission; j)ability of ties or sheeting
40、 to fail at a load below that which would endanger the supporting structure; k)area and protection required for safe handling of the LTC; l)need for intermittent access through the cladding; m) size of sheet, etc., pattern and frequency of attachment points; n)ability to retain heat; o)availability
41、of independent test data; p)level of site security required; q)durability of cladding for longer term projects. 4.5 Details of material performance should be sought from manufacturers or suppliers when selecting containment nets and sheets for use in highly abrasive, chemically aggressive or extreme
42、 temperature situations. 5 Precautions to be taken for particular applications 5.1Fixing to scaffolds Advice on scaffold construction is given in BS EN 12811-1. The number and frequency of scaffold fixings from the supporting scaffold framework into the main permanent structure should be calculated
43、in accordance with BS EN 12811-1 to ensure that the loads from the temporary cladding can be carried effectively. NOTE 1If LTC is fixed to the inside of the scaffolding, it could have added implications for the scaffold design. LTC should preferably be fixed to the outside of the scaffold standards
44、so that it will detach easily if the wind load becomes excessive. NOTE 2Guard rails provide an additional intermediate fixing position. LTC on normal scaffolds should be supported by the framework of ledgers and standards. The containment nets and sheets should be in direct contact with and fixed fi
45、rmly to the open edges of the platforms, handrails, etc., leaving no gaps where possible. Where they are designed to overlap, the lower edges of the upper nets or sheets should be tucked inside the top edges of the lower nets/sheets to ensure that falling dust and debris is retained inside the cladd
46、ing. Where the nets and sheets are being used to contain material thrown out by explosions, etc., it will be necessary to allow the upper sheet/net fall outside the lower one (see 5.3, Note 2). Licensed Copy: London South Bank University, London South Bank University, Fri Oct 05 02:52:29 GMT+00:00 2
47、007, Uncontrolled Copy, (c) BSI BSI 20075 BS 8410:2007 Where containment nets and sheets are fitted to tube and fitting scaffolds, the projection of scaffold elements, e.g. transoms, should be controlled so that they do not project more than 100 mm over the outside ledger. In all cases transom ends
48、and coupler bolts should be capped where there is danger that the temporary cladding could be damaged. In the case of GRP sheets, projecting ends of transoms should be avoided to allow the sheets to be firmly clamped to the standards and ledgers (see Annex B). 5.2Control and retention of fine partic
49、les In order to effectively control all dusts, grits, etc., LTC with low air porosity should be used. It should be correctly positioned to promote the flow of air in a particular direction, and coupled with forced ventilation. Containment sheets that have airtight joints can also be used for the control of fumes. Most applications are reasonably standard. Unusual arrangements will need to be specifically designed to reflect the type of layout, the configurations of the site and the characteristics of the cladding. Particular care mi